org.apache.hadoop.util

类 ToolRunner

java.lang.Object

org.apache.hadoop.util.ToolRunner

public class ToolRunner
extends Object

A utility to help run Tools.

ToolRunner can be used to run classes implementing Tool interface. It works in conjunction with GenericOptionsParser to parse the generic hadoop command line arguments and modifies the Configuration of the Tool. The application-specific options are passed along without being modified.

另请参阅:

Tool, GenericOptionsParser

构造器概要

构造器

构造器和说明
ToolRunner()

方法概要

方法

限定符和类型	方法和说明
static void	printGenericCommandUsage(PrintStream out) Prints generic command-line argurments and usage information.
static int	run(Configuration conf, Tool tool, String[] args) Runs the given Tool by Tool.run(String[]), after parsing with the given generic arguments.
static int	run(Tool tool, String[] args) Runs the Tool with its Configuration.

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造器详细资料

ToolRunner

public ToolRunner()

方法详细资料

run

public static int run(Configuration conf,
      Tool tool,
      String[] args)
               throws Exception

Runs the given Tool by Tool.run(String[]), after parsing with the given generic arguments. Uses the given Configuration, or builds one if null. Sets the Tool's configuration with the possibly modified version of the conf.

参数:

conf - Configuration for the Tool.

tool - Tool to run.

args - command-line arguments to the tool.

返回:

exit code of the Tool.run(String[]) method.

抛出:

Exception

run

public static int run(Tool tool,
      String[] args)
               throws Exception

Runs the Tool with its Configuration. Equivalent to run(tool.getConf(), tool, args).

参数:

tool - Tool to run.

args - command-line arguments to the tool.

返回:

exit code of the Tool.run(String[]) method.

抛出:

Exception

printGenericCommandUsage

public static void printGenericCommandUsage(PrintStream out)

Prints generic command-line argurments and usage information.

参数:

out - stream to write usage information to.